Kristin Cavallari: 'I have low energy and get headaches alot'

On high heels and under high stress, Cavallari interviewed with Us
Magazine while at the Alice + Olivia fashion show. Photo: Jeff
Gentner/Getty Images

Kristin Cavallari tries to make good health food choices.

The Hills star told Usmagazine.com she usually has "eggs and fruit for breakfast" and tries to schedule chicken and salad for lunch, but the actress admits to a busy schedule getting in the way of healthy eating, leading to extreme weight loss for the star.

Cavallari says her new MTV reality telvision show is keeping her busy promoting on the road, limiting her opportunities to "sit down and pig out."

To say on top of her duties and keep energy levels high, Cavallari relies on on-the-go food choices like energy bars or protein shakes.

Cavallari told Usmagazine.com. "I'm not normally like that. It's only been the past month. I have low energy and I get headaches a lot. I need to be better about it."

And for her workout regime? That's gone to scrap too. Cavallari admitted to working out only once in the last month.

"I did some lunges and push ups in my hotel room [before presenting at the MTV VMAs]," Usmagazine.com quoted the star as saying. "I've been a little stressed out. It's terrible, but stress can make you lose weight I guess."